Stereoisohypsograph



W. SANDER.

STEREOISOHYPSOGRAPH.

APPLICATION FILED 050.2, H120.

L4L35 983D Patented Nov 2L 11922.

1 Y Patented Nov.

WILLY SANDER, OF JENA, GERll/IANY, ASSZGNOE TS TEE FIRE-1E ZLISS,

STEREOISOl-IYPSOGRAPH.

Application filed December 2, 1920.

To all whom it :may concern:

Be it known that T, WILLY SANDER, a citizen of the German Empire,residing at Jena. Germany. have invented a new and usefulStereoisohypsograph, of which the following: is a specification. Y

The present invention relates to a device which permits of copying on aplane surface the surface of a spatial image to be obtained from aphotostereogram. and in particular. elements of this surface designatedheight-lines, and which device is equipped for this purpose with acomparator system comprising a binocular double microscope with twomarks, yielding a stereoscopic mark-image, and a slide system, and whichis positivelyconnected with a copying system, consisting of a spatialcross-slide system carrying the tool. in such a way that the position ofthe tool-point relatively to the copy-carrier corresponds at any onetime to the position of that point of the object-surface. the imag es ofwhich are seen in the comparator system as coinciding with its devicesare already known so far as tion of a photostereogram is coni. at thetaking of which the axes of objectiv s were horizontal. In these devicesthe slide system of the compaiatorsystem comprises four slides. Two oithe latter serve for efiec-ting a relative displacement of themicroscope and the photograms in the height-direction of the photograms.whilst the two others adjust the relative displacementof the photogramsand the microscope in the breadth-direction of the photograms.

The cross-slide system contains three slides. the one of which isdisplaoeable on a fixed base-plate in the depth-direction of thecopy-carrier, whilst the two others are displaceable beside each otheron the said first slide in the breadth-direction of the copy carrier.The cross-slide system is coupled to the comparator system by means ofthree levers.

According to the present invention the i" iresaid coupling is so devisedthat the dee also admits of copying height-lines it, on taking thephotostereogram from which the height-lines are to be taken. theobjecti*e-a-: es were inclined to the vertical or horizontal.

The annexed drawing shows a construc- Serial No. 427,866.

tional form in plan of a device correspond-.

ing to the present invention for copying height-lines on a drawingsurface.

On a l ase-plate (Z there is displaceably disposed a slide A. carrying abinocular double microscope a. the baseline of which is perpendicular tothe direction of displacement of the slide A and which contains a markin each of its two image-planes. The microscope (1. serves tor thestereoscopic obser 'ation of two photograms c, the. one of which restingupon a slide B which is displaceable on the base-plate (Z parallelly tothe base-line of the microscope (z, whilst the other one is carried by across-slide system which contains on the one hand a slide C 'which isdisplaceable on the baseplate (Z along the same guide as the slide l3.and which contains on the other hand a slide D which is adjustable onthe slide by means of a hand-wheel .2 in the (liection of dis placementof the slide A.

The base-plate (Z carries in addition a cross-slide system comprisingthree slides A B and C The slide C is displaceal'ily disposed on thebase-plate (Z in the direction ot'displacement of the slide A. Theslides A and B are displaceable on the slide C in the same direction asthe slides B and C on the base-plate. The slide A can be fixed on theslide C by means of a set screw w. The position adjusted at any one timecan be read otl on an indicating device. The slide B is displaccable bymeans of a screw-spindle m which is actu ated from a grooved shaft .111by a bevel wheel m and a bevel. wheel a, displaceable along the saidgrooved shatt al and coupled to the slide C by means of a driver. Theshaft 0 is actuated by a. hand-wheel .7? accessible to the right hand ofthe observer, the motions of this hand-wheel being trans mitted to theshaft .71 by a chain drive :0 The slide l3 carries a. drawing pencil f;the appertaining drawing board (Z fastened on the base-plate 1/. Theslide is displaced by two screw spindles 1/, the left one of which isactuated by a, hand-wheel 7 disposed on the left side of the observerand coupled to this spindle by means of a chain drive i whilst the rightone is actu ated from the left spindle by two pairs of bevel wheels 1yand 7 as well as shaft 3 F or transmitting the motions of the slide Aby means of a other arm of the cranked lever acts by means A to thecross-slide system A, B, C there serves a double lever which isrotatably supported on the base-plate (i about an axis and the two armsand j of which are adjustable-relatively to each other. For the purposeof adjustment the arm j is provided with an arc-guide 7' along which thearm j is movable. The clamping is eitected by a screw w. Whilst the armof the double lever j 7' acts on a stud ofthe slide slit, the arm y' isjointedly connected by a rod q with a cranked lever g which is rotatablysupported on the baseplate d and both arms of-which embrace a rightangle. The axis of rotation of this cranked lever 9' of the double lever1' j" in a stands perpendicularly to the displacement of the slide C armof the cranked lever acting from the rod 9 is parallel to the lever-armj; The

plane which direction of of a slit on a stud t of the slide 'A which isassumed to be adjustable on the slide A in the direction of displacementof the slide B.

The slide B is coupled to the cross-slide system A B C by means of adouble lever 1?, i rotatably supported on the baseplate d about an axis71 The arm 71 of the double lever acts by means of a slit 2' on a stud mof the slide B which is assumed to be adjustable on this slide in thedirection of displacement of the slide A. The other arm 71 of the doublelever acts by means of a slit 2' on the stud 0 of a'slide 0 which isadjustably disposed on the slide B in the direction of displacement ofthe slide 0 A set screw w serves for fixing the slide 0? The slide' 0 isin its zeroon the slide B position when the components of the distancesof the stud 0, falling into the directionof displacement of the slide. Gfrom the axis of rotation i and the stud on the slide A from the axis ofrotation are alike.

The coupling of the slide C with the crossslide system.A ,B C iseffected by a double lever I0 76*, rotatably supported on the base- Uiiplate d about an axls which lies with the axis of rotation i in a planeparallel to the direction of displacement of the slide 13. The two arms10 and 70 of the double lever it 70 are adjustable relatively to eachother, for which purpose the arm k is provided with an arc-guide 70along which the arm k is movable. The fixing is efiected by means of ascrew 10 The arm 10 acts by means of a slit k on a stud a of the slide Cwhich is assumed to he adjustable on this slide in the direction ofdisplacement of the slide A. The other arm 10 acts by means of a slit kon a stud pi This stud is disposed upon the upper slide pi, adjustablein the direction of displacement of the slide lies with the axis ofrotation has the Value 1 component of the distance of the stud e)Besides, the

reckoned clockwise from the arm 70*, they i iaaeea C of a cross-slidesystem, the lower slide 79 of which is adjustable on the slide B in thedirection of displacement of the latter A set screw to serves for fixingthe slide p on the slide p and by means of a set screw to the slide pmay be fixed on the slide B In order to be able to trace a height-linerepresenting the ground plan projection of a height-layer, the height ofwhich above the left-hand objective has the value Y, the device must beadjusted in the following manner. The component of the distance of thestud m from the axis of rotation i", lying cos 6 The corresponding fromthe axis of rotation 70 has the value The component of the distance ofthe stud t from the axis of rotation of the cranked lever g", lying inthe direction of displacement of the slide B, has the value 7. The armsj and j of the double lever j 7' are adjusted relatively to each otherin such a way that, when reckoned clockwise from the arm j they embracethe angle 18 0(5 and the arms 70 and k of the double lever k k in such away that, when embrace the angle 180+y. The slide A is displaced. fromits zero-position in which the arm j is parallel to the direction ofdisplacement of the slide C by the value Y, 1

measured by the copying scale. The displacement of the slide 0 from itszero-position, when measured by the copying scale, has the value Y tan(5 The slide 19 is displaced from its zero-position in which, at asimultaneous Zero-position of the slide 0 the studs p and 0 lie in aplane falling into the direction of displacement of the slide B whenmeasured by the copyingscale, by the value Y tan (5 cos y-l-b (sin a cosa tan {5 cos y sin e), whilst the displacement of the sllde p from itszero-positlon in which, at a simultaneous zero-position of the slides 39and 0 the arms i and k are parallel to each other, has the value 5 Y tansin "f-j-b (cos oz cos a tan (5 sin y sin 6), measured by the copyingscale.

In that case the following lettering has been adopted:

line) a angle of inclination of the horizontal projection of theleft-hand objective axis relatively to that perpendicular to the baseline which lies in the horizontal plane,

(5 angle of inclination of the left-hand 13o I b connecting line of theobjectives (base objective axis relatively to the horizontal p ane,

(5 angle of inclination of the right-hand objective axis relatively tothe horizontal plane,"

7 angle of inclination of the horizontal projections of the twoobjective axes relatively to one another,

e angle of inclination of-the base line relatively to the horizontal)lane.

In order to use the device the observer looking into the doublemiscroscope a must actuate the hand wheels a y and a in such a way thatthe stereoscopic mark-image is guided along the stereoscopicobject-image.

In that case the drawing'pencil f traces on the drawing board d theheight-line corresponding to the height Y adjusted on the indicatingdevice of the slide A I claim:

In a device for copying from a stereoscopic pair of photograms of anobject of three dimensions onto a plane surface the combination ofi astereo-comparator comprising four interdependent slides, A, B, C and D,a drawing device comprising three interdependent slides, A B and C ofwhich slides A and B are carried by C adjacent to each other, thedirection of displacement of slide A coinciding with the direction ofdisplacement of slide B means comprising three levers t'or positivelycoupling the slides A, B and C with those of the said drawing device, byone of which levers the slide A is coupled to the drawing device. thislever having two arms adjust able relatively to one another in its planeof rotation, while by the other two levers the slides B and C arecoupled to the drawing device, each of these levers having its point ofapplication displaceable in the direction of displacement of Crelatively to that slide of the drawing device, which contains the saidpoint, and one of these two levers having two arms adjustable relativelyto one another in its plane of rotation and having its point ofapplication displaceable still in the direction of displacement ofslides A and B relatively to that slide of the drawing device, whichcontains the said point, and a system of actuating devices controllingthe said stereo-comparator and the said drawing device, the said systembeing accessible to the operator while he is looking intothestereo-comparator.

wiLLY saunas.

Witnesses:

PAUL Knr'ienl, FRITZ LANDER,

